During which period of development is a developing organism most vulnerable to the effects of teratogens?
Understand the Problem
The question is asking during which developmental stage an organism is most susceptible to teratogens, which are substances that can cause birth defects. We need to identify the correct stage from the options provided: ovum, zygote, embryo, and foetus.
Answer
The first trimester or the first eight weeks of pregnancy, when major organs and systems are developing.
A developing organism is most vulnerable to teratogens during the embryonic period, specifically the first trimester or the first eight weeks of pregnancy. This is when major organs and systems are developing.
Answer for screen readers
A developing organism is most vulnerable to teratogens during the embryonic period, specifically the first trimester or the first eight weeks of pregnancy. This is when major organs and systems are developing.
More Information
Teratogens are substances that can cause developmental malformations (birth defects).
Tips
It is a common misconception that the fetus is equally vulnerable throughout the entire pregnancy. However, the specific timing of exposure to a teratogen determines the type and severity of the resulting birth defect.
Sources
- Teratogens - umich.edu
- Teratogens | Lifespan Development - Lumen Learning - courses.lumenlearning.com
- The developing organism is most vulnerable to teratogens during the - ck12.org
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